Differences

This shows you the differences between two versions of the page.

--- digic8:registers [2022/02/20 16:01] – [LV peaking (Highlights / zebra)] kitor
+++ digic8:registers [2022/02/20 16:51] – [LV peaking (Highlights / zebra)] kitor
@@ Line 40: / Line 40: @@
 Registers used by ''DispVram'' State object to control overexposure highlighting feature.
-Directly poking HDMI registers doesn't work (yet). For some reason, zebra enable/disable write is ignored/overwritten. It works while enabled via ''DispVram'' state change request.
+===Note on HDMI registers===
+Directly poking HDMI enable doesn't work. There's something running in DryOS that constantly overwrites this register with value saved in runtime.
-On EOS R it was possible to display independently configured zebras on LCD and HDMI, while in CleanHDMI mode.
+On R180.739 I was able to follow xrefs to that register, and found a function that writes them - on R180.739 source value is stored in ''b054''. If you apply the rules but write value to ''b054'' instead of register - it will get updated and zebras displayed on HDMI.
+__It is possible to have independent zebras configured on LCD and HDMI while running in Clean HDMI mode!__
 ===Enable register===
@@ Line 65: / Line 68: @@
 Value written should be masked ''0xB137FFFF'' with one read from ''reg + 0x2000''
-^ Field      ^ Range ^ Description ^
+^ Field        ^ Range ^ Description ^
 | visibility   | 0,1   | zebra visibility (do not confuse with Enable register)  |
 | speed        | 0-3   | lines/dots are moving slower -> faster                  |
@@ Line 73: / Line 76: @@
 | underexpo_th | 0-255 | Threshold on undexexpo register, ignored on overexpo    |
 | overexpo_th  | 0-255 | Threshold on overexpo register, ignored on underexpo    |
+**Note: On HDMI max threshold is 0xE8** Values above that are not displayed!
 ===Color register===